Mold for constructing hollow concrete walls.



No. 841,867. PATENTED JAN. 22, 1907.

H. J. HOUPT.

MOLD FOR GONSTRUGTING HOLLOW CONCRETE WALLS.

APPLIOATION ITILBD MAY 10,1906.

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PATENTED JAN. 22, 1907.

H. 1110mm.- MOLD FOR GONSTRUOTING HOLLOW CONCRETE WALLS.

APPLICATION FILED MAY 10.1906.

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' Svwonroc 45 lapsed and raised and clamped in position be To all-whom it may-concern: .Be i known that I, HENRY J. HoUPr, a

UNITED STATES PATENT OFFICE.

HENRY J. HOUPT, OF LEESBURG, VIRGINIA.

MOLD'FOR oous'rnuc'rme' HOLLOW CONCRETE WALLS.

' citizen of the United States, residing at Lees- 'ful Hollow Concrete Walls; and I do in thecounty of Loudoun and State of mia, have invented certain new and usemprovements in Molds for Constructing hereby declare the following'to'be a full, clear, and .ex-

.enable others skilled in the art to act description of the invention, such as will which it appertains to make and use the same.

My invention relates to certain new and useful improveme as in molds for building object to provide molds of simple and economic construction and adapted to be readily elevated I and sively addedto -and/heightened, the outer portions and the inner core of the mold being 20 secured in position as the Wall is succesa'lternately raised and secured in plumb and parallel positions.

My invention also has for its object to so construct the core of the mold that it may be in the details of readily collapsed to free it from the partiallysetconcrete and after being raised to the proper height clamped in position against the inner sides of the partially-formed wall; and with these ends in view my invention consists ment hereinafter morefully set forth.

In order that those skilled in the art to which my invention appertains may know 'how to make and use my improved molds and fully appreciate the 'advantag s of the same, I will proceed to describe t eir construction and the manner of using the same,

- referring by numerals to the accompanying drawings, in which- Figure 1 is a pers ective view outer portion and t improved molds.

showing the 1e inner core of one of my Fig. 2 is a vertical section .of thesame and showing, the concretewall formed between the outer portion and core of the mold. Fig. 3 is a similar view showing the core of the mold after it has been coltween the upper extremity of the artiallyformed wall. Fig. 4 is a section simi ar to Fig. 3" and showing the outer portion of the mold lifted up and placed in position after the space 3, has been filjled and again raised to the said Fig. lng two position shown in 3. Fig. 5 is a side elevation showmolds secured in position end to end Specification of Letters Patent. Application filed May 10, 1906. Serial Hm 316,138.

referred to, and are also threaded construction and arrange movement of such ro between the outer:- portion and core of the mold, as shown at Fig.

with concrete and before the core is collapsed I Patented Jan. 22, 1907.

and held in proper relation by the stays at one end of. one mold overlapping the end of-the' adjacent mold; and Fig. 6 is an inside eleva tion of one of the sides of the core and showing the arrangement of the collapsible hinges employed for connecting the two sides and clamping them in position against the insides of the upper extremity of t e partially-constru'cted wall, as illustrated at big. 3.

Similar reference-numerals indicate like parts in the several figures of the drawings.

1 2 are the two outside portions of the mold, which are made about twice the height of the sides of thecore. These side portions 1 and 2 are secured together and in parallelism by means of screw-rods 3, which have one end squared to receive a hollow crank or other suitable tool for turnin the same, and they are threaded for a suita le distance adjacent to the squared end to receive nuts, presently for a suit able distance at the other or extreme end.

The side portions have secured to their outer surfaces by screws vertical stays 4, composed of iron, through which the screwrods 3 pass, and these stays on the outer surface of the side 2 are threaded to receive the threads on the extreme end shown.

In securing the parts together a nut 5 is first run onto the screw-rod 3, and the latter is passed through a suitable hole or channel in the stay 4. A second nut 6 is then run onto the threads of the rod, and the threaded extreme and of'the rod is then run into the threaded passage of the. stay. The nuts 6 are not run up to and in contact with the inside of the portion 1 until the opposite portion 2 has been drawn into parallelism and proper adjustment with the portion 1 by means. of the rod 3, after which the nuts 6 are runup tightly against the portion 1. I

In order that the threaded extreme end of the rods 3 may have sufficient bearing in the stays of the side portion 2, such stays-are formed with bosses 7, as clearly shownya'nd if thought to. be necessary or desirable nuts, may be run upon the screw-rods each side of the side portion to prevent any accidental The rods 3 are located a short distance of the rods 3, as clearly from the upper and lower edges of the side" pieces, as 0 early shown in Figs. 2 and 3, so" that the lower rods will rest primarily upon a suitable footing or foundation 8 andsubsequently upon the upper extremity of suc- IIO' cessively molded ortionsof the concrete wall 9, as shown at ig. 4,

The core consists of two. sides 10, which are secured together by what I denominate toggle-hinges 11, the 'eculiar construction of which constitutes t e subject-matter of'another' application for Letters Patent filed concurrently herewith and having Serial No. 316,136. These hinges, as clearly shown at Fig. 6, have three pintles and four leaves so constructed and arranged together as to constitute a ruler-joint on the under side of the central pintle, in order that when the leaves each side of the central pintle are brought into horizontal alinement the lower extremities of the core will be forced into contact with the inside ofthe wall, as shown at formed, as s own, at Fig. 2, and has been sufficiently'set to justify the removal of the core to the position shown at Fig. 3, the hinges 11 are broken ,by forcing them downwardly by pressureupon the central pintle, and the core is thus suitably collapsed to permit it to be raised to the position shown at Fig. 3, whereu on the hinges are again straightened out to e c amp the core against the upper extremity of the wall in course of construction and into proper parallelism, as heretofore explained.

I prefer to employ one or more of these hinges at the central portion of the side pieces of the core, and the outer leaves of these hinges may be short and secured to the top and bottom edges of the side pieces, while near to the extreme ends of the side ieces the hinges are formed with their outer eaves sufliciently long to extend the whole depth of the side pieces to constitute a more extensive brace and prevent any undue warping of the side pieces of the core.

In order that these hinges may be secured with facility in place upon the inside of the sides of the core, the central pintle should be removable, and the intermediate hinges may also be formed with removable central intles and the outer leaves similarly secure to the inner surfaces of the side pieces instead of upon the edges, as heretofore stated.

While I have found that the arrangement of the rods 3 and the nuts thereon is entirely satisfactory for securing the sides 1 2 of the outer portionof the mold, I do notwish tabs limited in this respect, as other details of construction may be adopted forsuitabl connecting the side pieces in parallelism y the rods 3-such, for instance, as threaded bushings secured in positionwithin the side pieces and adapted to receive the threaded portions of the rods 3.

From the construction of the mold shown scribed, it will be seen that when it becomes and the method of using the same, as de-.

necessary to raisethe outer portionof the mold the upper rods maybe slightlyloosened,

and the lower screw-rods only need to be removed, and the holes thus left in the concrete filled. I The rods 3 pass throu hvertical stays 4, Se cured on theoutside of the side pieces 1 2, and these stays at one end of the side pieces extend beyond the same, as shown at Figs. 1 and 6, so as to overlap the end of the next adjacent mold and secure thewtwo sections in pr'fiper relation' and alinement with each ot er. a

The number and position of the stays t and I screw-rods 3 maybe varied accordin to the length of the molds and the'necessity for suitably strengthening the same.

I do not wish to be confined to any exact dimensions as to the length-hr height of the outer portion of the mold and the core; but I prefer that the core shouldbe substantially about half the height of the outer portion of the mold in order that .each succeeding portion of the wall as constructed may be braced and supported alternately by the outside or core, portion of the mold respectively, as the other portion is lifted into position for adding to the height of the wall.

It will also be understood that any desi nma be given to the outside surface oftie wa l by a corres onding design upon the in-- side surfaces of t e sides 1 2 of the mold.

Idesire to call particular attention to the importance of the collapsible core of my im proved mold, because it will be readily seen that contact of the. green wall with the sides of the c'ore would render it necessary to exert great power to lift the core unless it is collapsed and the vacuum broken.

Having described the construction and manner of using my im rovedmolds in the erection of concrete we is, what I claim as new, and desire to secure by Letters Patent, is

1. A mold for constructihg hollow concrete walls consisting of an outer portion comprising parallel sides having vertical stays extendin above the upper edges thereof; adjustab e screw-bolts passing through the parallel sides and the vertical stays near the ottom edge; adjustable screw-bolts passing through the vertical stays above the upper edges of the sides; and a collapsible core consisting of two ara'llel side pieces and toggle-hinges secured to the side pieces. in alternate inverse relation, substantially as hereinbefore. set forth. I

2. In a mold such as'described,a collapsible core comprising parallel side pieces and l y In testimony whereof I have signed my four-part toggle-hinges connecting said side I name to this specification in the presence of to pieces; said hinges secured to the side pieces two subscribing witnesses.

in alternate reverse relation, a portion of said I 5 hinges having their secured extremities eX- l' HENRY tending from the top to the bottom edges ,of Witnesses: the side pieces and constituting braces, sub- D. G. STUART,

stantially as set forth. JNo. J. HARROWER. 

